build(python): drop support for Python 3.6 and 3.7 (reanahub#793)

BREAKING CHANGE: drop support for Python 3.6 and 3.7

Closes reanahub#784

Author: mdonadoni

.github/workflows/ci.yml

@@ -55,7 +55,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: "3.8"
 
       - name: Check Python code formatting
         run: |
@@ -71,7 +71,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: "3.8"
 
       - name: Check compliance with pep8, pyflakes and circular complexity
         run: |
@@ -88,7 +88,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: "3.8"
 
       - name: Check compliance with Python docstring conventions
         run: |
@@ -104,7 +104,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: "3.8"
 
       - name: Check Python manifest completeness
         run: |
@@ -120,7 +120,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: "3.8"
 
       - name: Install system dependencies
         run: |
@@ -138,17 +138,14 @@ jobs:
 
   python-tests:
     runs-on: ubuntu-20.04
-    strategy:
-      matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Set up Python ${{ matrix.python-version }}
+      - name: Set up Python 3.8
         uses: actions/setup-python@v5
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: "3.8"
 
       - name: Install Python dependencies
         run: |
@@ -160,7 +157,6 @@ jobs:
         run: ./run-tests.sh --check-pytest
 
       - name: Codecov Coverage
-        if: matrix.python-version == 3.8
         uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}

setup.py

@@ -1,6 +1,6 @@
 #
 # This file is part of REANA.
-# Copyright (C) 2017, 2018, 2019, 2020, 2021, 2022, 2023 CERN.
+# Copyright (C) 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 CERN.
 #
 # REANA is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -79,6 +79,7 @@
             "reana-benchmark = reana.reana_benchmark.cli:reana_benchmark",
         ],
     },
+    python_requires=">=3.8",
     extras_require=extras_require,
     install_requires=install_requires,
     setup_requires=setup_requires,
@@ -90,10 +91,7 @@
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python",
         "Topic :: Internet :: WWW/HTTP :: Dynamic Content",